[IMP] web: restore scroll position

This rev. improves the way the scroll position is restored when
coming back to a view (e.g. open a kanban view, scroll, click on a
record to open it in a form view, go back to kanban using the
breadcrumbs):

 - generalize the scroll position handling from web_enterprise to
   web to make it available in the community webclient as well
 - also restore left scroll position, not only top (especially
   useful for grouped Kanban views with a lot of columns)
 - handle the case where the scrolling area is a sub element of
   the view (e.g. the grouped Kanban view in mobile).

Task 34037

Co-authored-by: Mohammed Shekha <msh@openerp.com>
Co-authored-by: Ankit Sathvara <asa@odoo.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/addons/web/static/src/js/views/abstract_renderer.js b/addons/web/static/src/js/views/abstract_renderer.js
index 935fcc6643e..2394fb31a64 100644
--- a/addons/web/static/src/js/views/abstract_renderer.js
+++ b/addons/web/static/src/js/views/abstract_renderer.js
@@ -36,6 +36,14 @@ return Widget.extend({
         this.$el.addClass(this.arch.attrs.class);
         return $.when(this._render(), this._super());
     },
+    /**
+     * Called each time the renderer is attached into the DOM.
+     */
+    on_attach_callback: function () {},
+    /**
+     * Called each time the renderer is detached from the DOM.
+     */
+    on_detach_callback: function () {},
 
     //--------------------------------------------------------------------------
     // Public